Restore Our Future's Michigan media buy: $885,985

2/15/12 11:38 PM EST

That's higher than the previously reported amount of about $600,000 spent on TV ads by the pro-Mitt Romney super PAC in the state, although, per a ROF official, that includes TV, radio and cable.

The filing shows that the purchase is for a "media buy," and the target is Rick Santorum.

The pro-Santorum super PAC, Red White and Blue Fund, is also going up with a mega-buy in the state, as Alex reported earlier tonight - an indication of the different approach that the former Pennsylvania senator and his allies are taking to attacks made by Romney's campaign and its allies.

Newt Gingrich largely left the ROF hits unanswered for weeks in Iowa, to his own detriment. Santorum and his backers are trying a more aggressive route.